1 Overview
The REF35EVM is a voltage reference evaluation module that demonstrates the REF35 integrated circuit from
Texas Instruments (TI).
The REF35 is an ultra-low power voltage reference with maximum 10 ppm/C temperature drift. The REF35 is
used primarily as a voltage reference for low power data converters.
The REF35 can be operated from V
REF
+ V
DO
to 6 V. The REF35 uses only 1.4 μA of current in active mode.
This device comes with a enable pin that allows the device to be set in shutdown mode. Under the shutdown
condition, the REF35 only consumes 0.1 μA of current. The REF35 is optimal for a wide range of applications
such as flow transmitters, blood glucose monitors, servo drive control modules, power quality analyzers, fault
indicators, oscilloscopes and process analytics.
The REF35EVM features a user selectable wide VIN input which uses a
linear regulator, allowing
the user to widen the input range to 40 V if so desired.. The VIN header can be connected to an external power
supply to provide power. All of the REF35 input and output pins are accessible for external connection via test
headers.
1.1 REF35EVM Features
• Includes: REF35125QDBVR
• Footprints for resistors and capacitors
• Multiple outputs for voltage measurements
KEY PARAMETERS
PARAMETER
PARAMETER LIMITS
Supply Voltage (VREF):
IN_VREF
0 V – 6 V
Supply Voltage (VLDO)
IN_LDO
0 V to 40 V
Enable Pin
EN
0 V to IN_VREF
Fixed Output Voltage:
VREF
1.25 V (REF35125QDBVR)
Output Current:
IOUT
-5 mA to 10 mA
CAUTION
Applying voltages above the limitations given in this table may cause permanent damage to your
hardware.
Overview
2
REF35EVM User's Guide
SNAU276 – JANUARY 2022
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